Airflow testing and commissioning in Norfolk

Airflow testing measures how much air each fan or valve actually moves, using a calibrated flow hood, and records it against the required rates. It is how you prove a ventilation system works, and for new homes it is part of the building regulations.

Norfolk has every kind of building, from old terraces to new estates and business parks, and every job is designed around the building in front of us, not a standard kit.

Airflow testing in Norfolk at a glance

Area: Norfolk
Towns listed: 11, largest Norwich
Postcode districts: NR16, NR17, NR30, NR31, NR1 and NR2
Price region: East of England
Survey: Charged visit, price agreed first

How we do it

Approved Document F expects mechanical ventilation in new dwellings to be tested with a flow device that has been calibrated within the last 12 months, and the results recorded on a commissioning sheet. The person commissioning should be registered with a competent person scheme for ventilation or show evidence of competence; we tell you who will sign your sheet when we quote. Testing is also useful outside new builds: it shows landlords and homeowners whether existing fans meet the rates, and it is the first step in rebalancing an MVHR system that no longer feels right.

MEV and dMEV commissioning

Trickle and boost rates measured and set.

MVHR commissioning

Supply and extract at every valve measured and balanced.

Remedial advice

If a fan fails, we explain why and quote the fix.

Guide prices in Norfolk

Airflow testing and commissioning guide prices in Norfolk
Work	Guide price
Airflow testing and commissioning sheet for extract fans (up to 6 fans) (per home)	£150–£310 inc VAT
MVHR or MEV commissioning test, every terminal measured and recorded (per system)	£255–£415 inc VAT
Rebalance and recommission an existing MVHR system (per system)	£255–£465 inc VAT

East of England rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.

Common reasons people call

A landlord file needs proof of ventilation
After rebalancing or extending a system
Building control needs a commissioning sheet

Rules in England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.

How the job runs

Book
Measure
Adjust
Record
Advise

Towns we cover in Norfolk

Questions about airflow testing and commissioning in Norfolk

Which towns in Norfolk do you cover?

All of Norfolk, including North Walsham, Downham Market, Norwich, Great Yarmouth and King's Lynn. If your town is not listed, send the postcode and we will confirm.

What equipment is used?

A flow hood that fits over the fan or valve and measures airflow in litres a second, calibrated within the last 12 months.

What happens if a fan fails the test?

We explain the likely cause, such as an undersized fan or a crushed duct, and quote to fix it. Many failures are cheap to put right.

Are prices different in Norfolk?

Our guide prices are adjusted by region. In Norfolk we use East of England rates, so airflow testing and commissioning sheet for extract fans (up to 6 fans) is typically £150 to £310 inc VAT per home.

Is the survey free in Norfolk?

This is a charged visit because it is servicing, testing or repair work. We tell you the cost before booking. Surveys for new installations on the UK mainland are free.